Earlier this year, Verizon was roundly criticized and sued for using "super cookies" that tracked its customers around the internet for advertising purposes regardless of whether or not they had deleted standard tracking cookies. So, naturally, it's making the trackers stronger and more persistent than ever.

Traditional web tracking uses cookies—small files stored on your computer—to monitor your behavior around the web. Recently, however, Verizon and other carriers have started using something known as tracking headers to follow you around the web. These trackers inject a special script into the connection of every one of its customers and can't be manually deleted or opted out of without contacting the provider directly. The trackers allowed Verizon and, until recently, AT&T (which stopped using the technology after widespread public outrage) to follow you around the web to target you with ads.